{"ScriptPreparationCode":"class Vector {\r\n constructor() {\r\n this.x = 0\r\n }\r\n}\r\nvar vec = new Vector()","TestCases":[{"Name":"instanceof","Code":"vec instanceof Map","IsDeferred":false},{"Name":"typeof","Code":"typeof vec === \u0027object\u0027","IsDeferred":false},{"Name":"property","Code":"vec.x != null","IsDeferred":false},{"Name":"isArray","Code":"Array.isArray(vec)","IsDeferred":false}]}